Valve



A. B. CARR.'

VALVE.

APPLICATION flu-:D JUNE 28. |920.

1,389,527? Patented June 7, 192i.

To all 'wh-0m t may concern:

-Be it known that I, ALVA BRUCE CARR, a citizen of the United States,A residing at Bellevue, in the Province of Alberta, Canada, have invented certain new and useful Improvements in Valves, ofwhich-the following is a specification. v

This invention relates to valves, and it comprises a valve casing, a valve seatarranged in the casing,`a valve adapted to engage the seat, a valve stem therefor, a portion of said valve stem being threaded, an internally threaded sleeve arranged in the casing, the threads on said valve stern engaging said internal threads, said sleeve being normally stationary whereby rotation of the valve stem opens or closes the valve, and being arranged whereby it may be permitted to revolve with the valve stem to grind the valve and valveseat, a packing nut arranged on the valve stem, a seat formed on said nut, and a shoulder on said .valve stem and adapted to engage said seat when the valve is opened; all as more fully hereinafter set forth and as claimed.

ln the present invention, I have produced a valve which may be ground on its seat under pressure. lt is not necessary in the present construction to remove the valve from the valve casing to grind it on the valve seat. The valve and valve stem are mounted in a sleeve having internal threads engaging external threads on a portion of the valve stem. Ordinarily the sleeve is stationary and rotation of the valve stem raises and lowers the valve on its seat. To grind the valve, it is merely necessary to loosen a packing nut which holds the sleeve in position, and when the nut is loosened, the valve stem may be turned, the sleeve turning with it so that the valve is held in Contact with the valve seat. Sufficient pressure may be applied to the valve stem to properly grind theA valve.

rlhe invention further comprises the provision of a second seat in the packing' nut and a sealing face or shoulder lon the valve stem adapted to engage said seat when the valve is open, thus eliminating the necessity of packing between the valve stem and the nut.

In the accompanying drawings, l have shown one embodiment of the invention. ln this showing,

Figure 1 is a side elevation of the valve.

Specification of Letters Patent. Patgntgd un@ 7,1921, Application inea :time 28, 1920. serial n. 392,269.

Fig.k 2 is a longitudinal sectional view through the valve casing showing the valve and valve stem in elevation.

.Fig.3 is a transverse sectional view the line 8f3 of Fig; 2, and

Fig. 4 is a similar view on theline 4-4 of Fig. 2j Y Referring to the drawings, the reference numeral 1 designates the valve casing which 1s provided with an inlet 2 and an outlet 3, A valve seatv 4 is arranged in the casing between the inlet and outlet. As shown, the seat is formed integral with the casing, but under somer conditions, the vvalve seat may be made separate and properly mountedin the valve casing. l Above the valve seat, the casing is provided with an annular shoulder 5 and a hollow internally threaded sleeve Gris supported on this shoulder. The end of the valve casing is screwl threaded, as at 7, and is adapted to receive a locking or packing nut 8, the inner end of which is adapted to engage the top of the threaded sleeve when the nut is tightened and retain the sleeve in position. A valve stem 9 is arranged in the casing, the valve stem being provided with a valve l0, adapted to seat upon the valve seat 4 to' close the valve. A valve stem guide 11 may be arranged below the valve.

A portion of the valve stem is threaded as at 12 and is adapted to engage the internal threads of the hollow sleeve. The inner face of the nut 8 is provided with a conical seat 13 and the stem of the valve is reduced as at 14 to form a shoulder or sealing face adapted to engage this seatl when the valve is opened; The end 15 of the Yvalve stem passes through an vopening in the nut 8 and it may be provided with any type of operating handle 16.

In operation, the parts are assembled, the

nut 8 being tightened until it engages theA ytop of the hollow sleeve 6 to hold the sleeve stationary. 1When the valve stem is rotated,

the engaging threads on the valve stem and the stationary sleeve cause the stem to move horizontally of the valve casing and move the valve 10 toward or away from the seat 4 to open or close the valve. When the valve is'opened, the face 14 engages the conical seat 13 to revent leakage around the valve stem. It 1s, therefore, apparent that the use of packing around the valve stem is unnecessary with a construction of this character, thus simplifying the construction of the valve and eliminating a cause of constant annoyance.

To grind the valve, the nut 8 is YloosenedV to permit free rotation of the sleeve with the valve stem. The valve l0 is then seated on the seat 4l;v and the valve stem rotated. Any desirable degree of pressure may be applied to the stem to properly grind the valve and the seat. A

It is'to'be understood that While l have described the preferred*embodiment of my invention, various changes in the shape, size, and arrangement 'of various parts may be resorted to Without departing from the spirit of the invention or the scope of the subjoined claims.

What I claim is l. A valve comprising a casing, a valve seat arranged in the valve casing, an annular shoulder formed in the casingabove the seat, an internally threaded cylindrical sleeve arranged thereon, means for securing said' sleeve against rotation, a valve adapted to engage said valve seat, and a valve stem to which said valve is secured, a portion of said valve stein being` threaded and adapted to engage the threads of said sleeve to permit opening and closingyvsaid sleeve when released from said securing means be- 2. A valve comprising a casing,a valve p y seat arranged in the valve casing7 an internally threaded cylindrical sleeve arranged in the casing above the valve seat, a valve adapted to engage said valve seat, a valve stem to which said valve is secured,` a portion of said valve stem being threaded and adapted to engage thethreads ofvsaid sleeve, a locking nut arranged in the end ofthe casing andsurrounding the valve stem, said nut being'- adapted to engage the top of said sleeve to hold the sleeve stationary7 a conical seat arranged on the inner face of said nut, the valve stem being provided with a sealing face adapted to engage said conical seat when the valve is in open position.

In testimony whereof I aix my signature in presence of tWo Witnesses. Y

Anvil; Banen enna. 

